I've got a few updates, nothing major but I figure it's easier on me to make small updates rather than larger ones.
I've got the misfires figured out. Spark plugs. When I installed the EJ20G the local parts store didn't have the NGKs I had originally asked for, so I accepted the Autolite cross-reference. They woked fine for a few weeks, but soon the misfires started. Out they came. I ordered what the 'net told me was the OEM EJ20G plug.
The Autolites after removal. They don't look bad, but the NGKs have had zero misfires since they were installed.

The NGKs in the background are OEM 100,000+ miles '02 WRX plugs.
More parts arrived for the built motor. '05 STI 550s. I already have the EJ25D rails needed to drop them into one of my EJ20G intake manifolds.
The last item I recently got in preperation for my built motor is a replacement cell phone. A 16gig iPhone 3G, to be exact. To be even more to the point, I got it to use an app called Dynoliscious. Basically it uses the iPhone's internal accelerometer to estimate acceration data. Kind of like the old G-techs used to do. I'm not looking for 100% accuracy. I'm more looking for repeatablity. It should turn into a valuable tool for tuning.
It outputs charts like these, and can even save them as pics to be exported. The yellow "horsepower" line is simply derived from the acceleration rate and the weight of the car, which is user defined. I put 3300 pounds for now.
The iPhone itself will give you estimated timeslips. It's been tested to be resonably accurate, but very repeatable with a solid, stable cradle in the car.
All the above "runs" were done very impromptu, with very transmission safe launches and shifts. I'm pretty satisfied with the "times", even if they are estimated. Once I get more experience using it, I'm sure it will become a great companion to the wideband, the laptop, and the PFC itself.
'93 Winestone SS Auto, '91 Pearl White SS.
'93 Pure White SS EJ20G slanty intercooled, SIDESWIPED! In stasis.
'94 FWD and '95 AWD Laguna Blue SVXs.
2017 Pure Red BRZ Limited w/Performance pack